DEVICE FOR CUTTING-OFF CLOTH OF PRESET LENGTH Russian patent published in 1994 - IPC

FIELD: light-industry mechanical engineering. SUBSTANCE: device has live-roller table for unwinding cloth from roll kinematically connected through chain transmission 2, worm gearing 3 and clutch 4 with electric motor 5 of transport mechanism; braking gear whose blocks 6 are connected through cam 7 and levers 8 with electromagnet 9; pressure roller 10; hopper 11 for cloth relaxation; pressure roller 12; feed drum 13 kinematically connected through electromagnetic clutch 14, chain transmission 15, worm gearing 3 and clutch 4 with electric motor 5. Rigidly attached to axle of feed drum 13 is perforated disk 16 interacting with transducer 17 of angular movement. Mechanism for compensation of inertial run-out of feed drum 13 has weight 19 eccentrically located on axle of electromagnetic clutch 18. Weight interacts with flexible plate 20 which is rigidly secured to body of electromagnetic clutch 18. Installed in longitudinal recesses of receiving and measuring table 21 on borders of standard length l_o are transducers 22 and 23 under transparent coating. Cutting-off mechanism has disk cutter 24 and rolling rollers 25 kinematically connected with electric motor 27 of cloth pressing and cutting mechanism. Control unit consists of pulse counters 39 and 40 whose inputs through PERMIT unit 38 and INHIBITION unit 37 are connected with angular movement transducer 17 and transducers 22 and 23 of beginning and end of standard length l_o. Output of counter 39 is connected with input of computing unit 4, whose second input is connected with output of setting unit 42 intended for setting length of cut-off cloth. Control unit outputs are connected to electric motor 5 of moving mechanism, electric motor 27 of cloth pressing and cutting mechanism, and electromagnetic clutches 14 and 18. EFFECT: higher efficiency. 1 dwg